CVE-2022-49326
rtl818x: Prevent using not initialized queues
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: rtl818x: Prevent using not initialized queues Using not existing queues can panic the kernel with rtl8180/rtl8185 cards. Ignore the skb priority for those cards, they only have one tx queue. Pierre Asselin ([email protected]) reported the kernel crash in the Gentoo forum: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html He also confirmed that this patch fixes the issue. In summary this happened: After updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a "divide error: 0000" when connecting to an AP. Control port tx now tries to use IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in 2.10. Since only the rtl8187se part of the driver supports QoS, the priority of the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185 cards. rtl8180 is then unconditionally reading out the priority and finally crashes on drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this patch: idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries "ring->entries" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got initialized.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 78% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < b5dca2cd3f0239512da808598b4e70557eb4c2a1
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < d7e30dfc166d33470bba31a42f9bbc346e5409d5
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 9d5e96cc1f1720019ce27b127a31695148d38bb0
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < b8ce58ab80faaea015c206382041ff3bcf5495ff
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 769ec2a824deae2f1268dfda14999a4d14d0d0c5
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 6ad81ad0cf5744738ce94c8e64051ddd80a1734c
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 98e55b0b876bde3353f4e074883d66ecb55c65a3
- affected fd6564fcdc0bfcd432e6e939f9538acc3905d08a – < 746285cf81dc19502ab238249d75f5990bd2d231
- affected 3.15
- unaffected < 3.15
- unaffected 4.9.318 – ≤ 4.9.*
- unaffected 4.14.283 – ≤ 4.14.*
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.121 – ≤ 5.10.*
- unaffected 5.15.46 – ≤ 5.15.*
- unaffected 5.17.14 – ≤ 5.17.*
- unaffected 5.18.3 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (9)
- https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 (opens in a new tab)
- https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 (opens in a new tab)
- https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 (opens in a new tab)
- https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff (opens in a new tab)
- https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 (opens in a new tab)
- https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c (opens in a new tab)
- https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 (opens in a new tab)
- https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 (opens in a new tab)
- https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49326)Record last updated .